woocommerce_loop_add_to_cart_args filter-hook . WC 1.0

Usage

add_filter( 'woocommerce_loop_add_to_cart_args', 'filter_function_name_6957', 10, 2 );
function filter_function_name_6957( $wp_parse_args, $product ){
	// filter...

	return $wp_parse_args;
}

$wp_parse_args

-

$product

-

Where the hook is called

$args = apply_filters( 'woocommerce_loop_add_to_cart_args', wp_parse_args( $args, $defaults ), $product );

Where in WP core the hook is used WooCommerce